What is the normal extracellular pCO2 range in mmHg?

The normal extracellular pCO2 range typically falls between 40-45 mmHg in arterial blood. This range reflects the balance between carbon dioxide production in the body and its removal through ventilation. The pCO2 is a critical component in the assessment of a patient's respiratory status and acid-base balance. When pCO2 levels are maintained within this normal range, it promotes adequate oxygenation and ensures that acid-base homeostasis is achieved, as elevated or decreased levels can lead to respiratory acidosis or alkalosis, respectively.

Understanding this range is particularly important in clinical practice, as alterations in pCO2 can indicate underlying respiratory or metabolic conditions that may require further evaluation and intervention. Therefore, recognizing that the right choice aligns with standard physiological values is essential for effective patient assessment and care.